EASY TO OPERATE - Durable metal side switch to change modes: 5 brightness settings with strobe, SOS, and beacon. INCREDIBLE POWER OPTIONS - Includes 21700 battery and battery sleeve for 18650, CR123, or RC123 compatibility. Built in USB-C fast charging port. IDEAL EDC DUTY LIGHT - At only 5.17 inches long and just 5.03 oz with included battery, it's a great choice for duty or EDC. Hard holster, pocket clip and lanyard included. HIGH PERFORMANCE EDC FLASHLIGHT - 1800 lumen output, over 321 yards of throw, and 1500 hours of runtime on ultra low. A truly indispensable companion for daily carry, work, on patrol, or for camping and hiking.